balance promotion settings

app/models/order_detail.rb

@@ -5,8 +5,28 @@ class OrderDetail < ActiveRecord::Base
   belongs_to :product
   belongs_to :order, :foreign_key => :order_id
   # has_one :order, :foreign_key=>:order_id, :primary_key=>:order_id
-  validates :order_no,:order_id,:product_id,:nums, presence: true
+  validates :order_no,:product_id,:nums, presence: true
+  validate :order_validation
+  def order_validation
+    if self.product_id > 0
+      prd = Product.where("id = ?", self.product_id).first
+      if prd1.blank?
+        self.errors.add(:product_id,"商品不存在，请重新填写商品ID")
+      else
+        self.product_name=prd.Name
+      end
+    end
+
+    if self.order_no.length>0
+      ord = Order.where("order_id = ?", self.order_no).first
+      if ord.blank?
+        self.errors.add(:order_id,"订单不存在，请重新填写编号")
+      else
+        self.order_id=order.Id
+      end
+    end
 
+  end
 
   def order_state
     order = Order.where("id = ?", self.order_id).first
@@ -117,7 +137,7 @@ class OrderDetail < ActiveRecord::Base
 
     edit do
       field :order_no
-      field :order_id
+      #field :order_id
       field :product_id
       field :nums
       field :is_zeng